Observable Binding

HTML

<script src="https://raw.github.com/SteveSanderson/knockout/7c374018ec2f81567592b1da955c045b560e0e8a/build/output/knockout-latest.js"></script>
<strong>Name: </strong>
<span data-bind="text: name"></span>

JavaScript

var viewModel = {
    name: ko.observable("Jim")
}

setTimeout(function() {
    viewModel.name("Nick");
}, 2000);

ko.applyBindings(viewModel);